School staff moved after some felt unwell

Staff at Mitcham Girls High School in Adelaide are being kept away from their administration building.

Some had reported feeling unwell after spending time there.

The South Australian Education Department has been unable to identify the source of the problem, so the school has decided to relocate staff to another building.

Voula Panayotopoulos from the Department's health branch says the building will remain vacant until the contaminant is found.

"Staff were complaining of respiratory problems, coughing, nausea," she said.

"We immediately took action and undertook testing, we removed chemicals, we cleaned the carpets, the situation seemed to [be] resolved but unfortunately there were some further symptoms and so we've been undertaking further investigations," she said.